I don't know what makes them so addictive but in potato chips it is salt and omega 6 linoleic acid as well, so that would be where I would start the search. You could search wholehealthsource or any of Bill Lands' work for the ill-effects of superfluous omega 6 fatty acids. Everything from heart disease to diabeties to cancer and obesity can be in part blamed on omega 6, whether it comes from soy oil or nuts and seeds. It is just that most people eat a -reasonable- amount of them. A lot of people would rather smoke than eat tons of omega 6. High smoking rates in Kitava and France haven't seemed to make them more susceptible to disease than places that love their "heart-healthy" omega 6 fats and smoke less.
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!